Pipe bevelers



O 1959 I J. HENDRICKS E1"AL 2,909,011

PIPE BEVELERS Filed Jan. 9, 1959 2 Sheets-Sheet. l

INVENTORS James find/12%;

Law

firm

BY v

Oct. 20, 1959 J. HENDRICKS ETAL 2,909,011

PIPE BEVELERS Filed Jan. 9, 1959 2 Sheets-Sheet 2 INVENTORS BY WQ ATTORNE S 1 2,9fl9,0ll Patented Oct. 20, 1959 2,909,011 PIPE BEVELERS James Hendricks and ErwinHenry Lass,

Blackfoot, Idaho 7 Application January 9, 1959, Serial No. 785,946 12 Claims. (C l. 51-102 Our invention is a novel pipe beveler adapted to be attached to any portable'grinder, either air or electric, the beveler being adapted to bevel pipes of various sizes prior to welding operations, and our invention being particularly valuable for beveling stainless steel pipes since the use of our beveler eliminates any necessity for filing the bevel of the pipe, as the Atomic Energy Commission prefers to avoid filing of the beveled pipes for the reason that the carbon present has a tendency to defect the welds.

A principal object of our invention is to provide a beveler unit which may be fastened to the shaft of a straight pattern grinder, either air or electrically driven, in such a manner that the unit may be used on pipes which may be rotated or which are secured in fixed position. I

A further object of our invention is to provide a pipe beveler of the above type which will speed-up the bevel- .ing process at least 75% and which will produce a factory bevel which cannot be obtained by the use of the conventional portable grinders; also to provide a pipe beveler in which the bevels may be obtained ranging from 20 to 60 by means of simple adjustments.

We will explain the invention with reference to the accompanying drawings which illustrateseveral practical embodiments thereof, to enable others familiar with the art to adopt and use the same; and will summarize the claims, the 'novel features 'of construction, and novel combinations of parts, for which protection is desired.

In said drawings: Fig. l is a perspective view of our novel pipe beveler showing same attached to the shaft of a'grinding wheel, and showing the mandrel of the unit upon which the pipe to be beveled may be placed for proper presentation to the grinding wheel. v Fig. 2 is an enlarged section on the line 2-2, Fig. 1,

showing in dot-and-dash lines a pipe mounted on the mandrel for proper presentation to the grinding wheel.

Fig. 3 is an enlarged perspective view of one of the angle clips of the unit.

Fig. 4 is a perspective view of another of the angle clips of the unit upon which the mandrel is mounted.

Fig. 5 is a perspective View showing one of the mandrel guides, detached, upon which larger sizes of pipe to be beveled may be mounted for proper presentation to thegrinding wheel.

Fig. 6 is an enlarged transverse section on the line 6-6, Fig. 5.

As shown in Fig. 1, our beveling unit is adapted to be mounted upon the shaft extension of a portable straight pattern grinder having anair or electric motor housed in a casing A, which has a shaft extension B at one end through which the shaft C (Fig. 2) of the motor extends, said shaft C carrying on its outer end a grinding wheel D, the unit AD being normally termed a straight pattern grinder. The grinding wheel D may beof Carborundum or emery or any other desiredmaterial, the straight patupon angle clip 4,

' of the bolt 5 in the'slots 1d tern grinder A-D. forming no part of our present invention. I

As shown in Figs. 1 and 2, our novel unit consists of a member 1 in the form of an angle clip (Fig. 3) having:- one leg adapted to contact extension B of the straight pat-- with The other leg 1c of member 1 (Figs. 1, 2 and 3) projects at substantially right angles to memberl and is provided intermediate its sides with an elongated slot 1d disposed substantially transversely of the axis of extension B. v

Adjustably mounted on flange 1c of member 1 is a second angle clip 4 (Fig. 4) having one leg 4a disposed substantially parallel with flange 1c, leg 4a having a second elongated slot 4b therein extending longitudinally thereof, substantially parallel with the axis of said extension; and a bolt 5 is passed through the registering slots 1d, 4b, said bolt 5 having a head 5a and at its opposite end a nut 6 (Fig. 2) whereby flange 4a may be drawn tightly towardflange 10. If desired a'series of Washers to adjust the angle clip 4 be beveled.

Upon clip4 is fixedly mounted a mandrel '8 by weld-Q the mandrel being positioned adjacent ing or otherwise,

grinding wheel 'D as shown-in Fig. l, and said mandrel preferably consisting of a tube of desired diameter hav-' ing its inner end welded or otherwise fixedly secured substantially intersectthe periphery of grinding wheel D somewhere along a radius of wheel D, the particularpoint of intersection-being determined by the number or thick ness of the washers 7 interposed betweenthe flanges 1c and 4a of the members 1 and 4, as shown in Fig.2.

By theabove construction when it is adjustment between the parts 1 and 4, and by the number or thickness of the washers 7, and also by the adjustment and 4b of the members 1 and 4. As shown in Fig. 2, the mandrel 8 holds the top of pipe P in close-contact with the periphery of grinding wheel D, it being' noted that'the upper portion of mandrel 8 adjacent grinding wheel D is beveled as at 8a so as to permit the end of pipe I to squarely and closely contact. grinding wheel D. i

Short lengths of pipe Pmay be beveled by placing;

androtatingthe pipe manual-' the grinder A-D in a vise 1y; while long lengths of pipe P can be beveled by fixedly securing the pipe P and rotating the grinder A-QD throughout.- arcs.' I f desired,

the mandrel 8 with its angle clip {ma y"be interchangeable with others to size, whereby factory precision bevels may be obtained,

As shown in Figs. "5 and 6, mandrel guides may. be

provided forbeveling the ends of pipes rangingfrom 2. 1 to 14 inches or largerin'diameter. In this modification, themandrel. such as 8 wouldbe-used in the'manner aforesaid, but over mandrel 8 a mandrel guide'may be; 5, used, t he same consisting. of a tubular member 10 of and carrying nuts 3, whereby member so that the axis of the mandrel 8 will 7 desired to "bevel the end of a pipe P shownin dot-and-dash lines in Fig. 2, i

securely supporting pipe, 1 thereof in proper beveling position with respect to grinding Wheel D, the particular angularity' of the bevel being controlled by the,

larger inside diameter than mandrel 8, the same having diametrically opposed set screws 11, which may be adjusted to contact the outer walls of mandrel 8, as clearly. shown inFig. 6v.

Adjacent each end of tubular guide member 10 are parti-circular discs 12 having parti-circular slots 13 in their peripheries snugly receiving the outer walls of tubular member 10, said circular plates 12 being welded or otherwise fixedly secured to tubular member 10. adjacent each, end thereof. The parti-circular plates 12 may be maintained in fixed spaced and parallel relation by means of a spacer bar 14 having its ends secured by welding or the like tothe faces of plates 12 within the peripheries thereof.

When the mandrel guides Iii-14 (Figs. and 6) are thus positioned upon mandrel 8, larger size pipes P may be slipped over the mandrel guides 14 with their upper inner peripheries resting upon the top of tubular member 10 (Fig. 6) and thus brought into proper grinding relation with respect to grinding Wheel D, the diameter of the parti-circular plates 12 conforming substantially with the internal diameters of the larger sized pipes P which are to be beveled. Obviously, the mandrel guides 1014 may be varied in size to suit any size pipe P. of relatively large size internal diameter.

By the above construction, the pipe P is to be beveled is inserted over mandrel 8, or over the mandrel guides 10-14, and the grinding wheel D rotated by either air or electric means. In order to bevel pipe P either said pipe may be rotated or the unit, whichever is more convenient for the operator, but if pipe P is rotated the grinder AD must be fastened securely.

If desired, mandrel 8 may be secured to angle clip 4 by means of bolts or screws so that the mandrelS may be removable and replaceable with one of a larger or smaller size.

Instead of using the mandrel guides 1014 shown in Figs. 5-6 for mounting larger size pipes P on the mandrel 8 for bringing same into proper grinding position, the mandrel guides 10-14 might be omitted where the pipe P to be beveled is of only slightly larger size than mandrel 8. In place of mandrel guides 10--14 a welding rod or the like might be wrapped around mandrel 8 so as to approximate the inside diameter of the. pipe P to be beveled. However, it is preferable to use for large sized pipes P the mandrel guides 1014 shown in Figs. 5 and 6.

This grinder, by using a small grinding disc, will give a U bevel on pipe, or hollow ground effect. Pipe Ts and Us can also be finished with a factory bevel after being salvaged from used pipe.

We do not limit our invention to the exact forms shown in the drawings, for obviously changes may be made therein within the scope of the claims.

We claim:

1. In combination with a grinder having a primemover housed in a casing provided with an extension for the prime-mover shaft, said shaft carrying a grindingwheel; a pipe beveler comprising an angle clip having one leg secured to said extension, and having an elongated slot in its other leg; a second angle cliphaving one leg disposed substantially parallel with the other leg of the first angle clip and having a second elongated slot therein; a bolt transfixing said slots; spacing washers on said bolt interposed between the bolted legs of said clips; a mandrel fixedly secured to said second angle clip adjacent said grinding wheel and having its longitudinal axis substantially intersecting the periphery of said grinding wheel, said mandrel being adapted to fit within a pipe whose end is to. be beveled and to support same in proper beveling position with respect to said grinding wheel, whereby relative rotation of the pipe and beveler will bevel the end of said pipe according to the adjustment of the angle clips of said beveler.

2. In a combination as set forth-in claim 1, said man- 4 drel being removably and replaceably mounted on said second angle clip.

3. 'In a combination as set forth in claim 1, a mandrel guide for a pipe of relatively large diameter, comprising a tubular member adapted to receive said mandrel; and parti-circular discs adjacent each end of said tubular member fixedly secured thereto, said discs each having parti-circular slots substantially tangent to the peripheries of the discs and snugly receiving the said tubular member, the said discs conforming substantially with the internal diameter of the relatively large pipe when the latter is positioned on the guide, with a portion of the pipe resting substantially upon a portion of the mandrel.

4. In a combination as set forth in claim 1, a coiled member around said mandrel substantially conforming with the inside diameter of a pipe to be beveled of somewhat larger size than said mandrel.

5. In combination with a grinder having a primemover housed in a casing provided with an extension at one end receiving the prime-mover shaft, and said shaft carrying a grinding wheel at its outer end; a pipe beveler comprising an angle clip having one leg clamped by a U-bolt to said extension, and having an elongated slot in its other leg; a second angle clip having one leg disposed substantially parallel with the other leg of the first angle clip and having a second elongated slot therein; a bolt transfixing said slots; spacing washers on said bolt interposed between said angle clips; a mandrel fixedly secured to said second angle clip adjacent said grinding wheel and having its longitudinal axis substantially intersecting the periphery of said grinding wheel, said mandrel being adapted to fit within a pipe whose end is to be beveled and to support same in proper beveling position with respect to said grinding wheel, whereby relative rotation of the pipe and beveler will bevel the end of said pipe according to the adjustment of the angle clips of said beveler.

6. In a combination as set forth in claim 5, said mandrel being removably and replaceably mounted on said second angle clip.

7. In a combination as set forth in claim 5, a mandrel guide for a pipe of relatively large diameter, comprising a tubular member adapted to receive said mandrel; set screws extending radially through said tubular member and adapted to engage said mandrel; and parti-circular discs adjacent each end of said tubular member fixedly secured thereto, said discs each having parti-circular slots substantially tangent to the peripheries of the discs and snugly receiving the said tubular member, the said discs conforming substantially with the internal diameter of the relatively large pipe when the latter is positioned on the guide, with a portion of the pipe resting substantially upon a portion of the mandrel.

8. In a combination as setv forth in claim 5, a coiled member around said mandrel substantially conforming with the inside diameter of a pipe to be beveled of somewhat larger size than said mandrel.

9. In combination with a straight pattern grinder having a prime-mover housed in a casing provided with an extension at one end receiving the prime-mover shaft, and said shaft carrying a grinding wheel at its outer end; a pipe beveler comprising an angle clip having one leg clamped by a U-bolt to said extension, and having an elongated slot in its other leg disposed substantially transversely of the axis of said extension; a second angle clip having one leg disposed substantially parallel with the other leg of the first angle clip and having a second elongated slot therein extending substantially parallel with the axis of said extension; a bolt transfixing said slots; a series of washers on said bolt interposed between said bolts and angle clips; a mandrel fixedly secured to said second angle clip adjacent said grinding wheel and having its longitudinal axis substantially intersecting the periphery of said grinding wheel, said mandrel being adapted to fit within a pipe whose end is to be beveled and to support same in proper beveling position with respect 5 to said grinding wheel, whereby relative rotation of the pipe and beveler will bevel the end of said pipe according to the adjustment of the angle clips of said beveler.

10. In a combination as set forth in claim 9, said mandrel being removably and replaceably mounted on said second angle clip.

11. in a combination as set forth in claim 9, a mandrel guide for a pipe of relatively large diameter, comprising a tubular member adapted to receive said mandrel; set screws extending radially through said tubular member and adapted to engage said mandrel; parti-circular discs adjacent each end of said tubular member fixedly secured thereto, said discs each having parti-circular slots substantially tangent to the peripheries of the discs snugly receiving the said tubular member, the said discs conforming substantially with the internal diameter of the relatively large pipe when the latter is positioned on the guide, with a portion of the pipe resting substantially upon a portion of the mandrel; and spacer means fixedly connecting said discs.

12. In a combination as set forth in claim 9, a coiled member around said mandrel substantially conforming with the inside diameter of a pipe to be beveled of somewhat larger size than said mandrel.

References Cited in the file of this patent Salmon Nov. 11. 1958 

